Hi Shane,   Thanks for your reply. I have computers connect to the router with Ethernet cable as well as mobile phones connecting through wireless. All experience the same problem.   I attache the TPG speed test page for your reference. It couldn't even make the connection through. I also attache a 3rd party speed test (OZspeedtest) page for your reference which only returned a download speed of 0.01Mbps.   Occasually when I re-boot the router the connection speed can resume to just under 20Mbps but it only last say around 10 minutes. And not every re-root could achieve that. In addition, I tried to switch off the firewall but it have no difference. In fact the firewall was on all the time when the speed at 20Mbps in the past.                         ... View more